Goldenrod paper is yellow paper that is sensitive to pH! Compared to pH paper, it is very cheap. Wiping the paper with a basic solution makes it turn red. Wiping the red areas with an acidic solution makes it turn back to yellow. This is a great way to tie chemistry to the Wood and Paper kit. Secret messages can be written on the yellow paper with wax. A basic solution will make the message appear and then an acidic solution will make it disappear again.
Goldenrod Paper Demo
Goldenrod paper is yellow paper that is sensitive to pH! Compared to pH paper, it is very cheap. Wiping the paper with a basic solution makes it turn red. Wiping the red areas with an acidic solution makes it turn back to yellow. This is a great way to tie chemistry to the Wood and Paper kit. Secret messages can be written on the yellow paper with wax. A basic solution will make the message appear and then an acidic solution will make it disappear again.
Here is a better explanation of the demo and a place to order it:
http://www.stevespanglerscience.com/product/1239
There is some goldenrod paper stored in the GK12 storage room.